the begginning

utils/funcexp/func_instr.cpp

@@ -0,0 +1,79 @@
+/* Copyright (C) 2014 InfiniDB, Inc.
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation; version 2 of
+   the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA. */
+
+/****************************************************************************
+* $Id: func_instr.cpp 3645 2013-03-19 13:10:24Z rdempsey $
+*
+*
+****************************************************************************/
+
+#include <cstdlib>
+#include <string>
+#include <sstream>
+using namespace std;
+
+#include "functor_int.h"
+#include "functioncolumn.h"
+#include "rowgroup.h"
+#include "utils_utf8.h"
+using namespace execplan;
+
+namespace funcexp
+{
+CalpontSystemCatalog::ColType Func_instr::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
+{
+	CalpontSystemCatalog::ColType ct;
+	ct.colDataType = CalpontSystemCatalog::VARCHAR;
+	ct.colWidth = 255;
+	return ct;
+}
+
+size_t Func_instr::in_str(const string& str, const string& substr, size_t start)
+{
+	// convert both inputs to wide character strings
+	std::wstring wcstr = utf8::utf8_to_wstring(str);
+	std::wstring wcsubstr = utf8::utf8_to_wstring(substr);
+
+	if ((str.length() && !wcstr.length()) ||
+		(substr.length() && !wcsubstr.length()))
+		// this means one or both of the strings had conversion errors to wide character
+		return 0;
+
+	size_t pos = wcstr.find(wcsubstr, start-1);
+	return (pos != string::npos ? pos+1 : 0);
+}
+
+int64_t Func_instr::getIntVal(rowgroup::Row& row,
+							FunctionParm& parm,
+							bool& isNull,
+							CalpontSystemCatalog::ColType&)
+{
+	uint64_t start = 1;
+	if (parm.size() == 3)
+		start = parm[2]->data()->getIntVal(row, isNull);
+
+	if (isNull || start == 0)
+		return 0;
+
+	//Bug 5110 : to support utf8 char type, we have to convert and search  
+	return in_str(parm[0]->data()->getStrVal(row, isNull), parm[1]->data()->getStrVal(row, isNull), start);
+
+}
+
+
+} // namespace funcexp
+// vim:ts=4 sw=4: